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            <h1>PreprocessingSst</h1><p>

This program processes satellite-to-satellite-tracking (SST) and kinematic orbit observations in a GRACE like configuration.
Three different observation groups are considered separately: SST and POD1/POD2 for the two satellites.
This program works similar to <a class="groops-program" href="PreprocessingPod.html">PreprocessingPod</a>, see there for details. Here only deviations
in the settings are explained.</p><p>Precise orbit data (POD) often contains systematic errors in addition to stochastic noise. In this case the
variance component estimation fails and assigns too much weight to the POD data. Therefore an additional
<strong class="groops-config-element">downweightPod</strong> factor can be applied to the standard deviation of POD for the next least squares adjustment
in the iteration. This factor should also applied as <strong class="groops-config-element">sigma</strong> in <a class="groops-class" href="observationType.html">observation</a>
for computation of the final solution e.g. with <a class="groops-program" href="NormalsSolverVCE.html">NormalsSolverVCE</a>.</p><p>Short time variations of the gravity field can be co-estimated together with the static/monthly
mean gravity field. The short time parameters must also be set in <a class="groops-class" href="parametrizationGravityType.html">observation:parametrizationGravity</a> and
can then be selected by <a class="groops-class" href="parameterSelectorType.html">estimateShortTimeVariations:parameterSelection</a>.
If these parameters are not time variable, for example when a range of static parameters is selected,
they are set up as constant for each time interval defined in <strong class="groops-config-element">inputfileArcList</strong>. The parameters are constrained by an
<a class="groops-class" href="autoregressiveModelSequenceType.html">estimateShortTimeVariations:autoregressiveModelSequence</a>. The weight of
the constrain equations in terms of the standard deviation can be estimated by means of
Variance Component Estimation (VCE) if <strong class="groops-config-element">estimateShortTimeVariations:estimateSigma</strong> is set.
The mathematical background of this co-estimation can be found in:</p><p>Kvas, A., Mayer-Gürr, T. GRACE gravity field recovery with background model uncertainties.
J Geod 93, 2543–2552 (2019). <a href="https://doi.org/10.1007/s00190-019-01314-1" target="_blank">https://doi.org/10.1007/s00190-019-01314-1</a>.
</p>
<table class="table table-hover">
<tr class="table-primary"><th>Name</th><th>Type</th><th>Annotation</th></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">outputfileSolution</div></div></td><td>filename</td><td>estimated parameter vector (static part only)</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">outputfileSigmax</div></div></td><td>filename</td><td>standard deviations of the parameters (sqrt of the diagonal of the inverse normal equation)</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">outputfileParameterName</div></div></td><td>filename</td><td>estimated signal parameters (index is appended)</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">estimateArcSigmas</div></div></td><td>sequence</td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfileSigmasPerArcSst</div></div></td><td>filename</td><td>accuracies of each arc (SST)</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfileSigmasPerArcPod1</div></div></td><td>filename</td><td>accuracies of each arc (POD1)</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfileSigmasPerArcPod2</div></div></td><td>filename</td><td>accuracies of each arc (POD2)</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">estimateEpochSigmas</div></div></td><td>sequence</td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfileSigmasPerEpochSst</div></div></td><td>filename</td><td>accuracies of each epoch (SST)</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfileSigmasPerEpochPod1</div></div></td><td>filename</td><td>accuracies of each epoch (POD1)</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfileSigmasPerEpochPod2</div></div></td><td>filename</td><td>accuracies of each epoch (POD2)</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">estimateCovarianceFunctions</div></div></td><td>sequence</td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfileCovarianceFunctionSst</div></div></td><td>filename</td><td>covariance function</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfileCovarianceFunctionPod1</div></div></td><td>filename</td><td>covariance functions for along, cross, radial direction</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfileCovarianceFunctionPod2</div></div></td><td>filename</td><td>covariance functions for along, cross, radial direction</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">estimateSstArcCovarianceSigmas</div></div></td><td>sequence</td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfileSigmasCovarianceMatrixArc</div></div></td><td>filename</td><td>one variance factor per matrix</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">computeResiduals</div></div></td><td>sequence</td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfileSstResiduals</div></div></td><td>filename</td><td></td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfilePod1Residuals</div></div></td><td>filename</td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">outputfilePod2Residuals</div></div></td><td>filename</td><td></td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config mustset">observation</div></div></td><td>choice</td><td>obervation equations (Sst)</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config mustset">sstIntegral</div></div></td><td>sequence</td><td>integral approach</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional">inputfileSatelliteModel1</div></div></td><td>filename</td><td>satellite macro model</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional">inputfileSatelliteModel2</div></div></td><td>filename</td><td>satellite macro model</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config mustset-unbounded">rightHandSide</div></div></td><td><a href="sstRightSideType.html">sstRightSide</a></td><td>input for the reduced observation vector</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config mustset">sstType</div></div></td><td>choice</td><td></td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-3"><div class="h-100 config mustset">range</div></div></td><td></td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-3"><div class="h-100 config mustset">rangeRate</div></div></td><td></td><td></td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-3"><div class="h-100 config mustset">rangeAcceleration</div></div></td><td></td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-3"><div class="h-100 config mustset">none</div></div></td><td></td><td></td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config mustset">inputfileOrbit1</div></div></td><td>filename</td><td>used to evaluate the observation equations, not used as observations</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config mustset">inputfileOrbit2</div></div></td><td>filename</td><td>used to evaluate the observation equations, not used as observations</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config mustset">inputfileStarCamera1</div></div></td><td>filename</td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config mustset">inputfileStarCamera2</div></div></td><td>filename</td><td></td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config mustset">earthRotation</div></div></td><td><a href="earthRotationType.html">earthRotation</a></td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional">ephemerides</div></div></td><td><a href="ephemeridesType.html">ephemerides</a></td><td></td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional-unbounded">gradientfield</div></div></td><td><a href="gravityfieldType.html">gravityfield</a></td><td>low order field to estimate the change of the gravity by position adjustement</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional-unbounded">parametrizationGravity</div></div></td><td><a href="parametrizationGravityType.html">parametrizationGravity</a></td><td>gravity field parametrization</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional-unbounded">parametrizationAcceleration1</div></div></td><td><a href="parametrizationAccelerationType.html">parametrizationAcceleration</a></td><td>orbit1 force parameters</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional-unbounded">parametrizationAcceleration2</div></div></td><td><a href="parametrizationAccelerationType.html">parametrizationAcceleration</a></td><td>orbit2 force parameters</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional-unbounded">parametrizationSst</div></div></td><td><a href="parametrizationSatelliteTrackingType.html">parametrizationSatelliteTracking</a></td><td>satellite tracking parameter</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional">keepSatelliteStates</div></div></td><td>boolean</td><td>set boundary values of each arc global</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional">integrationDegree</div></div></td><td>uint</td><td>integration of forces by polynomial approximation of degree n</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional">interpolationDegree</div></div></td><td>uint</td><td>orbit interpolation by polynomial approximation of degree n</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config mustset">sstVariational</div></div></td><td>sequence</td><td>variational equations</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config mustset">rightHandSide</div></div></td><td>sequence</td><td>input for observation vectors</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-3"><div class="h-100 config mustset-unbounded">inputfileSatelliteTracking</div></div></td><td>filename</td><td>ranging observations and corrections</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-3"><div class="h-100 config optional">inputfileOrbit1</div></div></td><td>filename</td><td>kinematic positions of satellite A as observations</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-3"><div class="h-100 config optional">inputfileOrbit2</div></div></td><td>filename</td><td>kinematic positions of satellite B as observations</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config mustset">sstType</div></div></td><td>choice</td><td></td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-3"><div class="h-100 config mustset">range</div></div></td><td></td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-3"><div class="h-100 config mustset">rangeRate</div></div></td><td></td><td></td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-3"><div class="h-100 config mustset">none</div></div></td><td></td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config mustset">inputfileVariational1</div></div></td><td>filename</td><td>approximate position and integrated state matrix</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config mustset">inputfileVariational2</div></div></td><td>filename</td><td>approximate position and integrated state matrix</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional">ephemerides</div></div></td><td><a href="ephemeridesType.html">ephemerides</a></td><td></td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional-unbounded">parametrizationGravity</div></div></td><td><a href="parametrizationGravityType.html">parametrizationGravity</a></td><td>gravity field parametrization</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional-unbounded">parametrizationAcceleration1</div></div></td><td><a href="parametrizationAccelerationType.html">parametrizationAcceleration</a></td><td>orbit1 force parameters</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional-unbounded">parametrizationAcceleration2</div></div></td><td><a href="parametrizationAccelerationType.html">parametrizationAcceleration</a></td><td>orbit2 force parameters</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional-unbounded">parametrizationSst</div></div></td><td><a href="parametrizationSatelliteTrackingType.html">parametrizationSatelliteTracking</a></td><td>satellite tracking parameter</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional">integrationDegree</div></div></td><td>uint</td><td>integration of forces by polynomial approximation of degree n</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-2"><div class="h-100 config optional">interpolationDegree</div></div></td><td>uint</td><td>orbit interpolation by polynomial approximation of degree n</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config mustset">covarianceSst</div></div></td><td>sequence</td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">sigma</div></div></td><td>double</td><td>apriori factor of covariance function</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">inputfileSigmasPerArc</div></div></td><td>filename</td><td>apriori different accuaries for each arc (multiplicated with sigma)</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">inputfileSigmasPerEpoch</div></div></td><td>filename</td><td>apriori different accuaries for each epoch</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">inputfileCovarianceFunction</div></div></td><td>filename</td><td>approximate covariances in time</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional-unbounded">inputfileCovarianceMatrixArc</div></div></td><td>filename</td><td>Must be given per sst arc with correct dimensions.</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">inputfileSigmasCovarianceMatrixArc</div></div></td><td>filename</td><td>Vector with one sigma for each <inputfileCovarianceMatrixArc></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">sampling</div></div></td><td>double</td><td>[seconds] sampling of the covariance function</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config mustset">covariancePod1</div></div></td><td>sequence</td><td></td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">sigma</div></div></td><td>double</td><td>apriori factor of covariance function</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">inputfileSigmasPerArc</div></div></td><td>filename</td><td>apriori different accuaries for each arc (multiplicated with sigma)</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">inputfileSigmasPerEpoch</div></div></td><td>filename</td><td>apriori different accuaries for each epoch</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">inputfileCovarianceFunction</div></div></td><td>filename</td><td>approximate covariances in time</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">inputfileCovariancePodEpoch</div></div></td><td>filename</td><td>3x3 epoch covariances</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">sampling</div></div></td><td>double</td><td>[seconds] sampling of the covariance function</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config mustset">covariancePod2</div></div></td><td>sequence</td><td></td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">sigma</div></div></td><td>double</td><td>apriori factor of covariance function</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">inputfileSigmasPerArc</div></div></td><td>filename</td><td>apriori different accuaries for each arc (multiplicated with sigma)</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">inputfileSigmasPerEpoch</div></div></td><td>filename</td><td>apriori different accuaries for each epoch</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">inputfileCovarianceFunction</div></div></td><td>filename</td><td>approximate covariances in time</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">inputfileCovariancePodEpoch</div></div></td><td>filename</td><td>3x3 epoch covariances</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">sampling</div></div></td><td>double</td><td>[seconds] sampling of the covariance function</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">estimateShortTimeVariations</div></div></td><td>sequence</td><td>co-estimate short time gravity field variations</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config optional">estimateSigma</div></div></td><td>boolean</td><td>estimate standard deviation via VCE</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config mustset">autoregressiveModelSequence</div></div></td><td><a href="autoregressiveModelSequenceType.html">autoregressiveModelSequence</a></td><td>AR model sequence for constraining short time gravity variations</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-1"><div class="h-100 config mustset-unbounded">parameterSelection</div></div></td><td><a href="parameterSelectorType.html">parameterSelector</a></td><td>parameters describing the short time gravity field</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">downweightPod</div></div></td><td>double</td><td>downweight factor for POD</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">inputfileArcList</div></div></td><td>filename</td><td>list to correspond points of time to arc numbers</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">iterationCount</div></div></td><td>uint</td><td>(maximum) number of iterations for the estimation of calibration parameter and error PSD</td></tr>
<tr class="table-light"><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">variableNameIterations</div></div></td><td>string</td><td>All output fileNames in preprocessing iteration are expanded with this variable prior to writing to disk</td></tr>
<tr class=""><td class="m-0"><div class="h-100 config-tree depth-0"><div class="h-100 config optional">defaultBlockSize</div></div></td><td>uint</td><td>block size of static normal equation blocks</td></tr>
</table>
This program is <a class="groops-ref" href="general.parallelization.html">parallelized</a>.

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